No: "we're going to invest $11k + $3k per founder, for up to 3 founders"
Whoops! Thanks. I think I was distracted because at first I thought "k" was the variable representing # of founders, and then when I figured that out... ah, forget it. I'm an idiot.
If I understood well, 4 = 3 because the costs of 4 persons are near to the costs of 3 (in YC point of view)
"Starting in winter 2010, we're going to invest $11k + $3k per founder, for up to 3 founders.
So now 1 founder will get $14k, 2 $17k, 3 $20k, and 4 $20k."